(19)

(11)

EP 4 103 843 A1

(12)

(43) Date of publication: 21.12.2022 Bulletin 2022/51 (21) Application number: 21706667.9 (22) Date of filing: 10.02.2021

(51) International Patent Classification (IPC):  F04C 23/00(2006.01) F04C 29/00(2006.01) F04C 25/02(2006.01) F01C 21/10(2006.01) (52) Cooperative Patent Classification (CPC): F04C 25/02; F04C 23/001; F04C 29/0014; F04C 2240/10; F01C 21/10; F04C 2280/04; F04C 2220/50 (86) International application number: PCT/GB2021/050300 (87) International publication number: WO 2021/161009 (19.08.2021 Gazette 2021/33)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 12.02.2020 GB 202001932 (71) Applicant: Edwards Limited Burgess Hill, Sussex RH15 9TW (GB)	(72) Inventors: HOLBROOK, Alan Ernest Kinnaird Burgess Hill Sussex RH15 9TW (GB) BEDWELL, David Burgess Hill Sussex RH15 9TW (GB) (74) Representative: Totman, Clare Elizabeth  Edwards Limited Innovation Drive Burgess Hill, West Sussex RH15 9TW Burgess Hill, West Sussex RH15 9TW (GB)